1100111220012 has 144 divisors (see below), whose sum is σ = 3076004456448. Its totient is φ = 304896493440.

The previous prime is 1100111220011. The next prime is 1100111220029. The reversal of 1100111220012 is 2100221110011.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1100111220012.

It is not an unprimeable number, because it can be changed into a prime (1100111220011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7124853 + ... + 7277619.

Almost surely, 2^{1100111220012} is an apocalyptic number.

1100111220012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1100111220012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1538002228224).

1100111220012 is an abundant number, since it is smaller than the sum of its proper divisors (1975893236436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1100111220012 is a wasteful number, since it uses less digits than its factorization.

1100111220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153156 (or 153147 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1100111220012 its reverse (2100221110011), we get a palindrome (3200332330023).

The spelling of 1100111220012 in words is "one trillion, one hundred billion, one hundred eleven million, two hundred twenty thousand, twelve".